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2x+6x=400
We simplify the equation to the form, which is simple to understand
2x+6x=400
We move all terms containing x to the left and all other terms to the right.
+2x+6x=+400
We simplify left and right side of the equation.
+8x=+400
We divide both sides of the equation by 8 to get x.
x=50
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